Cretaceous ammonite Placenticeras syrtale Morton found in Barbour County. Ammonites first appeared in the seas 400 million years ago and died out during the Cretaceous-Paleogene mass extinction about 66 million years ago. This specimen dates to the Campanian age, approximately 72 to 83 million years ago.
Cretaceous Ammonite
Courtesy of the University of Alabama Museums/Alabama Museum of Natural History